//
//  UncaughtExceptionHandler.m
//  AutoInsurance
//
//  Created by dream4java on 12-12-6.
//
//

#import "UncaughtExceptionHandler.h"
#include <libkern/OSAtomic.h>
#include <execinfo.h>

NSString * const UncaughtExceptionHandlerSignalExceptionName = @"UncaughtExceptionHandlerSignalExceptionName";
NSString * const UncaughtExceptionHandlerSignalKey = @"UncaughtExceptionHandlerSignalKey";
NSString * const UncaughtExceptionHandlerAddressesKey = @"UncaughtExceptionHandlerAddressesKey";

volatile int32_t UncaughtExceptionCount = 0;
const int32_t UncaughtExceptionMaximum = 10;

const NSInteger UncaughtExceptionHandlerSkipAddressCount = 4;
const NSInteger UncaughtExceptionHandlerReportAddressCount = 5;

@implementation UncaughtExceptionHandler


+ (NSArray *)backtrace
{
    void* callstack[128];
    int frames = backtrace(callstack, 128);
    char **strs = backtrace_symbols(callstack, frames);
    
    int i;
    NSMutableArray *backtrace = [NSMutableArray arrayWithCapacity:frames];
    for (
         i = UncaughtExceptionHandlerSkipAddressCount;
         i < UncaughtExceptionHandlerSkipAddressCount +
         UncaughtExceptionHandlerReportAddressCount;
         i++)
    {
	 	[backtrace addObject:[NSString stringWithUTF8String:strs[i]]];
    }
    free(strs);
    
    return backtrace;
}

- (void)alertView:(UIAlertView *)anAlertView clickedButtonAtIndex:(NSInteger)anIndex
{
	if (anIndex == 0)
	{
		dismissed = YES;
	}
    else if(anIndex==1)
    {
        NSArray *arr=[AppException callStackSymbols];
        NSString *reason=[AppException reason];
        NSString *name=[AppException name];
        NSString *urlStr = [NSString stringWithFormat:@"mailto://yaokuaia@163.com?subject=CPICApp太保 Bug &body=Thanks for your coorperation!<br><br><br>"
                            "Details:<br>%@<br>--------------------------<br>%@<br>---------------------<br>%@",
                            name,reason,[arr componentsJoinedByString:@"<br>"]];
        
        NSURL *url = [NSURL URLWithString:[urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
        [[UIApplication sharedApplication] openURL:url];
    }
    
}

- (void)validateAndSaveCriticalApplicationData
{
	
}

- (void)handleException:(NSException *)exception
{
	[self validateAndSaveCriticalApplicationData];
	AppException=exception;
	UIAlertView *alert =
    [[[UIAlertView alloc]
      initWithTitle:NSLocalizedString(@"Unhandled exception", nil)
      message:[NSString stringWithFormat:NSLocalizedString(
                                                           @"亲，应用程序遇到错误，请重新启动程序!\n\n"
                                                           @"Debug details follow:\n%@\n%@", nil),
               [exception reason],
               [[exception userInfo] objectForKey:UncaughtExceptionHandlerAddressesKey]]
      delegate:self
      cancelButtonTitle:NSLocalizedString(@"Quit", nil)
      otherButtonTitles:NSLocalizedString(@"Send", nil), nil]
     autorelease];
	[alert show];
    

	
	CFRunLoopRef runLoop = CFRunLoopGetCurrent();
	CFArrayRef allModes = CFRunLoopCopyAllModes(runLoop);
	
	while (!dismissed)
	{
		for (NSString *mode in (NSArray *)allModes)
		{
			CFRunLoopRunInMode((CFStringRef)mode, 0.001, false);
		}
	}
	
	CFRelease(allModes);
    
	NSSetUncaughtExceptionHandler(NULL);
	signal(SIGABRT, SIG_DFL);
	signal(SIGILL, SIG_DFL);
	signal(SIGSEGV, SIG_DFL);
	signal(SIGFPE, SIG_DFL);
	signal(SIGBUS, SIG_DFL);
	signal(SIGPIPE, SIG_DFL);
	
	if ([[exception name] isEqual:UncaughtExceptionHandlerSignalExceptionName])
	{
		kill(getpid(), [[[exception userInfo] objectForKey:UncaughtExceptionHandlerSignalKey] intValue]);
	}
	else
	{
		[exception raise];
	}
}

@end


void HandleException(NSException *exception)
{
	int32_t exceptionCount = OSAtomicIncrement32(&UncaughtExceptionCount);
	if (exceptionCount > UncaughtExceptionMaximum)
	{
		return;
	}
	
	NSArray *callStack = [UncaughtExceptionHandler backtrace];
	NSMutableDictionary *userInfo =
    [NSMutableDictionary dictionaryWithDictionary:[exception userInfo]];
	[userInfo
     setObject:callStack
     forKey:UncaughtExceptionHandlerAddressesKey];
	
	[[[[UncaughtExceptionHandler alloc] init] autorelease]
     performSelectorOnMainThread:@selector(handleException:)
     withObject:
     [NSException
      exceptionWithName:[exception name]
      reason:[exception reason]
      userInfo:userInfo]
     waitUntilDone:YES];
}

void SignalHandler(int signal)
{
	int32_t exceptionCount = OSAtomicIncrement32(&UncaughtExceptionCount);
	if (exceptionCount > UncaughtExceptionMaximum)
	{
		return;
	}
	
	NSMutableDictionary *userInfo =
    [NSMutableDictionary
     dictionaryWithObject:[NSNumber numberWithInt:signal]
     forKey:UncaughtExceptionHandlerSignalKey];
    
	NSArray *callStack = [UncaughtExceptionHandler backtrace];
	[userInfo
     setObject:callStack
     forKey:UncaughtExceptionHandlerAddressesKey];
	
	[[[[UncaughtExceptionHandler alloc] init] autorelease]
     performSelectorOnMainThread:@selector(handleException:)
     withObject:
     [NSException
      exceptionWithName:UncaughtExceptionHandlerSignalExceptionName
      reason:
      [NSString stringWithFormat:
       NSLocalizedString(@"Signal %d was raised.", nil),
       signal]
      userInfo:
      [NSDictionary
       dictionaryWithObject:[NSNumber numberWithInt:signal]
       forKey:UncaughtExceptionHandlerSignalKey]]
     waitUntilDone:YES];
}

void InstallUncaughtExceptionHandler(void)
{
	NSSetUncaughtExceptionHandler(&HandleException);
	signal(SIGABRT, SignalHandler);
	signal(SIGILL, SignalHandler);
	signal(SIGSEGV, SignalHandler);
	signal(SIGFPE, SignalHandler);
	signal(SIGBUS, SignalHandler);
	signal(SIGPIPE, SignalHandler);
}


